Surface roughness tester SRTPro

During the measuring procedure the sensor moves linearly along the measured length. The probe moves accordingly to the profile on the surface. These movements are converted into electric signals which are amplified, filtered and converted into digital signals by an A/D converter. These signals are then refined in the main processor as Ra and Rz values ​​(or Rq and Rt metrics) and displayed on the screen.


  • Easy to operate menu
  • Display of 14 roughness parameters
  • Wave filtering methods: RC , PC - RC , GAUSS , D-P
  • Cutoff wavelength: 0.25 mm / 0.8 mm / 2.5 mm
  • Displays the probe positioning
  • Sensor for measurements in boreholes , openings and grooves
  • USB interface
  • Selectable languages: English, German


  • Detects the roughness of hard surfaces as well as inside holes, openings and grooves
  • For example at: Labs, measuring rooms, workshops, engineering facilities, and many more
Surface roughness tester SRTPro

Standard delivery range

  • Device SRTPro
  • Standard micro switch TS-100
  • Roughness Standard Ra
  • Protective cap for sensor
  • Charger 220V 50Hz
  • Data cable for printer and PC
  • Case, instruction manual
  • DataView software 

Optional accessory

  • Portable Bluetooth Printer 
  • Measurement Stand


All SaluTron® gauges correspond to national (DIN) and international (ISO, BS, ASTM) norms and possess the CE-sign.
Specifications are subject to change without prior notice.

Roughness Ra, Rz==Ry(JIS), Rq, Rt==Rmax, Rp, Rv, R3z, R3y, Rz(JIS), Rs, Rsk, Rku, Rsm, Rmr;
µm/µinch switchable
Measuring range Ra, Rq: 0,005 - 16 µm
Rz, R3z, Ry, Rp, Rt, Rm: 0,02 - 80 µm
RSm, RS: 1.000 µm
Rsk, Tp: 100 %
Resolution 0,001 μm / 0,04 µinch
Accuracy ≤ 10%
Repeatability ≤ 6%
Cross wavelength (cut-off) 0,25 mm / 0,8 mm / 2,5 mm / Auto
Traversing length Ln 1 - 5 cut-off (selectable)
Traverising speed 0.25 mm - 0.135 mm/s
0.8 mm - 0.5 mm/s
2.25mm - 1 mm/s
Digital-filter RC, PC-RC, GAUSS, D-P
Sensor Standard-model TS-100, induktive, Diamond peak 5µm radius, 90°-angle
Sensor measuring range ± 20µm / ± 40µm / ± 80µm
Language Menu: English, German
Display 128 x 64 OLED Dot Matrix Display
Power supply Built-in 3.7V Li-Ion Battery, charger AC220V/DC5V, 800mA / 3 hour, operating time 20 hours
Surroundings -20°C - +40ºC, ≤ 90% rel. air humidity
Dimensions (L x W x H) 141 x 55 x 40 mm (Device without probe)
Weight 400g